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Old Dec 26, 2020 | 12:44 PM
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Very cold this morning 28° and usually when I turn on fan for heat the AC button light comes on and I punch it off. Today it didn't come on but heat was on as expected. Punch AC button and it flashes a few times and goes out. Question, was this because it was so cold? Ran codes and have none. Thinking is was because it was so cold that AC light and compressor wouldn't come on. No oem manual to review. Thoughts, thanks
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Old Dec 26, 2020 | 01:37 PM
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Yes, if ambient temperature is too low the AC will not work..it is one of the “inputs” the PCM uses to determine if will let the AC turn on !!
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Old Dec 26, 2020 | 01:46 PM
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[QUOTE=C5 Diag;1602726445]Yes, if ambient temperature is too low the AC will not work..it is one of the “inputs” the PCM uses to determine if will let the AC turn

Thanks for clarifying, was hoping that was the reason.
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Old Dec 26, 2020 | 01:50 PM
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[QUOTE=bjones7131;1602726505]
Originally Posted by C5 Diag
Yes, if ambient temperature is too low the AC will not work..it is one of the “inputs” the PCM uses to determine if will let the AC turn

Thanks for clarifying, was hoping that was the reason.
No problem !!...if it doesn’t work at higher temps just let us know...the “book”temperature is more than 38 degrees ambient !!
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Old Dec 26, 2020 | 11:11 PM
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Moved over to C5 Tech.
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